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gstreamer/gst/realmedia/rmdemux.c
Thomas Vander Stichele dbc62ec935 releasing 0.9.4 
Original commit message from CVS:
releasing 0.9.4
2005-10-23 22:44:44 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2003> David A. Schleef <ds@schleef.org>
* Copyright (C) <2004> Stephane Loeuillet <gstreamer@leroutier.net>
* Copyright (C) <2005> Owen Fraser-Green <owen@discobabe.net>
* Copyright (C) <2005> Michael Smith <fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "rmdemux.h"
#include <string.h>
#include <ctype.h>
#include <zlib.h>
#define RMDEMUX_GUINT32_GET(a) GST_READ_UINT32_BE(a)
#define RMDEMUX_GUINT16_GET(a) GST_READ_UINT16_BE(a)
#define RMDEMUX_FOURCC_GET(a) GST_READ_UINT32_LE(a)
#define HEADER_SIZE 10
#define DATA_SIZE 8
typedef struct _GstRMDemuxIndex GstRMDemuxIndex;
struct _GstRMDemuxStream
{
guint32 subtype;
guint32 fourcc;
guint32 subformat;
guint32 format;
int id;
GstCaps *caps;
GstPad *pad;
int timescale;
int sample_index;
GstRMDemuxIndex *index;
int index_length;
double frame_rate;
guint32 seek_offset;
guint16 width;
guint16 height;
guint16 flavor;
guint16 rate; // samplerate
guint16 n_channels; // channels
guint16 sample_width; // bits_per_sample
guint16 leaf_size; // subpacket_size
guint32 packet_size; // coded_frame_size
guint16 version;
guint32 extra_data_size; // codec_data_length
guint8 *extra_data; // extras
};
struct _GstRMDemuxIndex
{
guint32 offset;
GstClockTime timestamp;
};
static GstElementDetails gst_rmdemux_details = {
"RealMedia Demuxer",
"Codec/Demuxer",
"Demultiplex a RealMedia file into audio and video streams",
"David Schleef <ds@schleef.org>"
};
enum
{
LAST_SIGNAL
};
enum
{
ARG_0
};
static GstStaticPadTemplate gst_rmdemux_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/vnd.rn-realmedia")
);
static GstStaticPadTemplate gst_rmdemux_videosrc_template =
GST_STATIC_PAD_TEMPLATE ("video_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gst_rmdemux_audiosrc_template =
GST_STATIC_PAD_TEMPLATE ("audio_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (rmdemux_debug);
#define GST_CAT_DEFAULT rmdemux_debug
static GstElementClass *parent_class = NULL;
static void gst_rmdemux_class_init (GstRMDemuxClass * klass);
static void gst_rmdemux_base_init (GstRMDemuxClass * klass);
static void gst_rmdemux_init (GstRMDemux * rmdemux);
static void gst_rmdemux_dispose (GObject * object);
static GstStateChangeReturn gst_rmdemux_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_rmdemux_chain (GstPad * pad, GstBuffer * buffer);
static void gst_rmdemux_loop (GstPad * pad);
static gboolean gst_rmdemux_sink_activate (GstPad * sinkpad);
static gboolean gst_rmdemux_sink_activate_push (GstPad * sinkpad,
gboolean active);
static gboolean gst_rmdemux_sink_activate_pull (GstPad * sinkpad,
gboolean active);
static gboolean gst_rmdemux_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_rmdemux_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_rmdemux_send_event (GstRMDemux * rmdemux, GstEvent * event);
static const GstQueryType *gst_rmdemux_src_query_types (GstPad * pad);
static gboolean gst_rmdemux_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_rmdemux_perform_seek (GstRMDemux * rmdemux, gboolean flush);
static void gst_rmdemux_parse__rmf (GstRMDemux * rmdemux, const void *data,
int length);
static void gst_rmdemux_parse_prop (GstRMDemux * rmdemux, const void *data,
int length);
static void gst_rmdemux_parse_mdpr (GstRMDemux * rmdemux, const void *data,
int length);
static guint gst_rmdemux_parse_indx (GstRMDemux * rmdemux, const void *data,
int length);
static void gst_rmdemux_parse_data (GstRMDemux * rmdemux, const void *data,
int length);
static void gst_rmdemux_parse_cont (GstRMDemux * rmdemux, const void *data,
int length);
static GstFlowReturn gst_rmdemux_parse_packet (GstRMDemux * rmdemux,
const void *data, guint16 version, guint16 length);
static void gst_rmdemux_parse_indx_data (GstRMDemux * rmdemux, const void *data,
int length);
static GstCaps *gst_rmdemux_src_getcaps (GstPad * pad);
static GstRMDemuxStream *gst_rmdemux_get_stream_by_id (GstRMDemux * rmdemux,
int id);
static GType
gst_rmdemux_get_type (void)
{
static GType rmdemux_type = 0;
if (!rmdemux_type) {
static const GTypeInfo rmdemux_info = {
sizeof (GstRMDemuxClass),
(GBaseInitFunc) gst_rmdemux_base_init, NULL,
(GClassInitFunc) gst_rmdemux_class_init,
NULL, NULL, sizeof (GstRMDemux), 0,
(GInstanceInitFunc) gst_rmdemux_init,
};
rmdemux_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstRMDemux", &rmdemux_info,
0);
}
return rmdemux_type;
}
static void
gst_rmdemux_base_init (GstRMDemuxClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rmdemux_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rmdemux_videosrc_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rmdemux_audiosrc_template));
gst_element_class_set_details (element_class, &gst_rmdemux_details);
}
static void
gst_rmdemux_class_init (GstRMDemuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gstelement_class->change_state = gst_rmdemux_change_state;
GST_DEBUG_CATEGORY_INIT (rmdemux_debug, "rmdemux",
0, "Demuxer for Realmedia streams");
gobject_class->dispose = gst_rmdemux_dispose;
}
static void
gst_rmdemux_dispose (GObject * object)
{
GstRMDemux *rmdemux = GST_RMDEMUX (object);
if (rmdemux->adapter) {
g_object_unref (rmdemux->adapter);
rmdemux->adapter = NULL;
}
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static void
gst_rmdemux_init (GstRMDemux * rmdemux)
{
rmdemux->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_rmdemux_sink_template), "sink");
gst_pad_set_event_function (rmdemux->sinkpad, gst_rmdemux_sink_event);
gst_pad_set_chain_function (rmdemux->sinkpad, gst_rmdemux_chain);
gst_pad_set_activate_function (rmdemux->sinkpad, gst_rmdemux_sink_activate);
gst_pad_set_activatepull_function (rmdemux->sinkpad,
gst_rmdemux_sink_activate_pull);
gst_pad_set_activatepush_function (rmdemux->sinkpad,
gst_rmdemux_sink_activate_push);
gst_element_add_pad (GST_ELEMENT (rmdemux), rmdemux->sinkpad);
rmdemux->adapter = gst_adapter_new ();
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rmdemux",
GST_RANK_PRIMARY, GST_TYPE_RMDEMUX);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"rmdemux",
"Realmedia stream demuxer",
plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)
static gboolean gst_rmdemux_sink_event (GstPad * pad, GstEvent * event)
{
gboolean ret = TRUE;
GstRMDemux *rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
GST_LOG_OBJECT (rmdemux, "Event on sink: NEWSEGMENT");
gst_event_unref (event);
break;
default:
GST_LOG_OBJECT (rmdemux, "Event on sink: type=%d",
GST_EVENT_TYPE (event));
ret = gst_pad_event_default (pad, event);
break;
}
return ret;
}
static gboolean
gst_rmdemux_src_event (GstPad * pad, GstEvent * event)
{
gboolean ret = TRUE;
GstRMDemux *rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_LOG_OBJECT (rmdemux, "handling src event");
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
gboolean running;
gboolean flush;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
GST_LOG_OBJECT (rmdemux, "Event on src: SEEK");
/* can't seek if we are not seekable, FIXME could pass the
* seek query upstream after converting it to bytes using
* the average bitrate of the stream. */
if (!rmdemux->seekable) {
ret = FALSE;
GST_DEBUG ("seek on non seekable stream");
goto done_unref;
}
gst_event_parse_seek (event, NULL, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
/* we can only seek on time */
if (format != GST_FORMAT_TIME) {
ret = FALSE;
GST_DEBUG ("can only seek on TIME");
goto done_unref;
}
GST_LOCK (rmdemux);
if (cur_type == GST_SEEK_TYPE_SET)
rmdemux->segment_start = cur;
else if (cur_type == GST_SEEK_TYPE_CUR)
rmdemux->segment_start += cur;
else if (cur_type == GST_SEEK_TYPE_END)
rmdemux->segment_start = rmdemux->duration + cur;
if (stop_type == GST_SEEK_TYPE_SET)
rmdemux->segment_stop = stop;
else if (cur_type == GST_SEEK_TYPE_CUR)
rmdemux->segment_stop += cur;
else if (cur_type == GST_SEEK_TYPE_END)
rmdemux->segment_stop = rmdemux->duration + cur;
/* Now do a sanity-check */
if (rmdemux->segment_stop < rmdemux->segment_start) {
GST_UNLOCK (rmdemux);
ret = FALSE;
GST_DEBUG_OBJECT (rmdemux, "Seek had stop " G_GUINT64_FORMAT " < start "
G_GUINT64_FORMAT ", cannot perform seek",
rmdemux->segment_stop, rmdemux->segment_start);
goto done_unref;
}
rmdemux->segment_play = !!(flags & GST_SEEK_FLAG_SEGMENT);
flush = !!(flags & GST_SEEK_FLAG_FLUSH);
gst_event_unref (event);
GST_DEBUG ("segment positions set to %" GST_TIME_FORMAT "-%"
GST_TIME_FORMAT, GST_TIME_ARGS (rmdemux->segment_start),
GST_TIME_ARGS (rmdemux->segment_stop));
/* check if we can do the seek now */
running = rmdemux->running;
GST_UNLOCK (rmdemux);
/* now do the seek */
if (running) {
ret = gst_rmdemux_perform_seek (rmdemux, flush);
} else
ret = TRUE;
break;
}
default:
GST_LOG_OBJECT (rmdemux, "Event on src: type=%d", GST_EVENT_TYPE (event));
ret = gst_pad_event_default (pad, event);
break;
}
return ret;
done_unref:
GST_DEBUG ("error handling event");
gst_event_unref (event);
return ret;
}
/* Validate that this looks like a reasonable point to seek to */
static gboolean
gst_rmdemux_validate_offset (GstRMDemux * rmdemux)
{
GstBuffer *buffer;
GstFlowReturn flowret;
guint16 version, length;
gboolean ret = TRUE;
flowret = gst_pad_pull_range (rmdemux->sinkpad, rmdemux->offset, 4, &buffer);
if (flowret != GST_FLOW_OK) {
GST_DEBUG_OBJECT (rmdemux, "Failed to pull data at offset %d",
rmdemux->offset);
return FALSE;
}
// TODO: Can we also be seeking to a 'DATA' chunk header? Check this.
// Also, for the case we currently handle, can we check any more? It's pretty
// sucky to not be validating a little more heavily than this...
/* This should now be the start of a data packet header. That begins with
* a 2-byte 'version' field, which has to be 0 or 1, then a length. I'm not
* certain what values are valid for length, but it must always be at least
* 4 bytes, and we can check that it won't take us past our known total size
*/
version = RMDEMUX_GUINT16_GET (GST_BUFFER_DATA (buffer));
if (version != 0 && version != 1) {
GST_DEBUG_OBJECT (rmdemux, "Expected version 0 or 1, got %d",
(int) version);
ret = FALSE;
}
length = RMDEMUX_GUINT16_GET (GST_BUFFER_DATA (buffer) + 2);
// TODO: Also check against total stream length
if (length < 4) {
GST_DEBUG_OBJECT (rmdemux, "Expected length >= 4, got %d", (int) length);
ret = FALSE;
}
if (ret) {
rmdemux->offset += 4;
gst_adapter_clear (rmdemux->adapter);
gst_adapter_push (rmdemux->adapter, buffer);
} else {
GST_WARNING_OBJECT (rmdemux, "Failed to validate seek offset at %d",
rmdemux->offset);
}
return ret;
}
static gboolean
find_seek_offset_bytes (GstRMDemux * rmdemux, guint target)
{
int i, n;
gboolean ret = FALSE;
for (n = 0; n < rmdemux->n_streams; n++) {
GstRMDemuxStream *stream;
stream = rmdemux->streams[n];
/* Search backwards through this stream's index until we find the first
* timestamp before our target time */
for (i = stream->index_length - 1; i >= 0; i--) {
if (stream->index[i].offset <= target) {
/* Set the seek_offset for the stream so we don't bother parsing it
* until we've passed that point */
stream->seek_offset = stream->index[i].offset;
rmdemux->offset = stream->index[i].offset;
ret = TRUE;
break;
}
}
}
return ret;
}
static gboolean
find_seek_offset_time (GstRMDemux * rmdemux, GstClockTime time)
{
int i, n;
gboolean ret = FALSE;
GstClockTime earliest = GST_CLOCK_TIME_NONE;
for (n = 0; n < rmdemux->n_streams; n++) {
GstRMDemuxStream *stream;
stream = rmdemux->streams[n];
/* Search backwards through this stream's index until we find the first
* timestamp before our target time */
for (i = stream->index_length - 1; i >= 0; i--) {
if (stream->index[i].timestamp <= time) {
/* Set the seek_offset for the stream so we don't bother parsing it
* until we've passed that point */
stream->seek_offset = stream->index[i].offset;
/* If it's also the earliest timestamp we've seen of all streams, then
* that's our target!
*/
if (earliest == GST_CLOCK_TIME_NONE ||
stream->index[i].timestamp < earliest) {
earliest = stream->index[i].timestamp;
rmdemux->offset = stream->index[i].offset;
GST_DEBUG_OBJECT (rmdemux,
"We're looking for %" GST_TIME_FORMAT
" and we found that stream %d has the latest index at %"
GST_TIME_FORMAT, GST_TIME_ARGS (rmdemux->segment_start), n,
GST_TIME_ARGS (earliest));
}
ret = TRUE;
break;
}
}
}
return ret;
}
static gboolean
gst_rmdemux_perform_seek (GstRMDemux * rmdemux, gboolean flush)
{
gboolean validated;
gboolean ret = TRUE;
/* nothing configured, play complete file */
if (rmdemux->segment_start == GST_CLOCK_TIME_NONE)
rmdemux->segment_start = 0;
if (rmdemux->segment_stop == GST_CLOCK_TIME_NONE)
rmdemux->segment_stop = rmdemux->duration;
rmdemux->segment_start = CLAMP (rmdemux->segment_start, 0, rmdemux->duration);
rmdemux->segment_stop = CLAMP (rmdemux->segment_stop, 0, rmdemux->duration);
/* first step is to unlock the streaming thread if it is
* blocked in a chain call, we do this by starting the flush. */
if (flush) {
gboolean res;
res = gst_pad_push_event (rmdemux->sinkpad, gst_event_new_flush_start ());
if (!res) {
GST_WARNING_OBJECT (rmdemux, "Failed to push event upstream!");
}
res = gst_rmdemux_send_event (rmdemux, gst_event_new_flush_start ());
if (!res) {
GST_WARNING_OBJECT (rmdemux, "Failed to push event downstream!");
}
} else {
gst_pad_pause_task (rmdemux->sinkpad);
}
GST_LOG_OBJECT (rmdemux, "Done starting flushes");
/* now grab the stream lock so that streaming cannot continue, for
* non flushing seeks when the element is in PAUSED this could block
* forever. */
GST_STREAM_LOCK (rmdemux->sinkpad);
GST_LOG_OBJECT (rmdemux, "Took streamlock");
/* we need to stop flushing on the sinkpad as we're going to use it
* next. We can do this as we have the STREAM lock now. */
gst_pad_push_event (rmdemux->sinkpad, gst_event_new_flush_stop ());
GST_LOG_OBJECT (rmdemux, "Pushed FLUSH_STOP event");
/* For each stream, find the first index offset equal to or before our seek
* target. Of these, find the smallest offset. That's where we seek to.
*
* Then we pull 4 bytes from that offset, validate that we've seeked to a
* DATA chunk (with the DATA fourcc).
* If that fails, restart, with the seek target set to one less than the
* offset we just tried. If we run out of places to try, treat that as a fatal
* error.
*/
if (!find_seek_offset_time (rmdemux, rmdemux->segment_start)) {
GST_LOG_OBJECT (rmdemux, "Failed to find seek offset by time");
ret = FALSE;
goto done;
}
GST_LOG_OBJECT (rmdemux, "Validating offset %u", rmdemux->offset);
validated = gst_rmdemux_validate_offset (rmdemux);
while (!validated) {
GST_INFO_OBJECT (rmdemux, "Failed to validate offset at %u",
rmdemux->offset);
if (!find_seek_offset_bytes (rmdemux, rmdemux->offset - 1)) {
ret = FALSE;
goto done;
}
validated = gst_rmdemux_validate_offset (rmdemux);
}
GST_LOG_OBJECT (rmdemux, "Found final offset. Excellent!");
/* now we have a new position, prepare for streaming again */
{
GstEvent *event;
/* Reset the demuxer state */
rmdemux->state = RMDEMUX_STATE_DATA_PACKET;
rmdemux->cur_timestamp = GST_CLOCK_TIME_NONE;
if (flush)
gst_rmdemux_send_event (rmdemux, gst_event_new_flush_stop ());
/* create the discont event we are going to send out */
event = gst_event_new_newsegment (FALSE, 1.0,
GST_FORMAT_TIME, (gint64) rmdemux->segment_start,
(gint64) rmdemux->segment_stop, rmdemux->segment_start);
GST_DEBUG_OBJECT (rmdemux,
"sending NEWSEGMENT event to all src pads with segment_start= %"
GST_TIME_FORMAT, GST_TIME_ARGS (rmdemux->segment_start));
gst_rmdemux_send_event (rmdemux, event);
/* notify start of new segment */
if (rmdemux->segment_play) {
gst_element_post_message (GST_ELEMENT (rmdemux),
gst_message_new_segment_start (GST_OBJECT (rmdemux), GST_FORMAT_TIME,
rmdemux->segment_start));
}
/* restart our task since it might have been stopped when we did the
* flush. */
gst_pad_start_task (rmdemux->sinkpad, (GstTaskFunction) gst_rmdemux_loop,
rmdemux->sinkpad);
}
done:
/* streaming can continue now */
GST_STREAM_UNLOCK (rmdemux->sinkpad);
return ret;
}
static gboolean
gst_rmdemux_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstRMDemux *rmdemux;
rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
GST_DEBUG_OBJECT (rmdemux, "src_query position");
gst_query_set_position (query, GST_FORMAT_TIME, -1); //rmdemux->cur_timestamp,
break;
case GST_QUERY_DURATION:
GST_DEBUG_OBJECT (rmdemux, "src_query duration");
gst_query_set_duration (query, GST_FORMAT_TIME, //rmdemux->cur_timestamp,
rmdemux->duration);
break;
default:
res = FALSE;
break;
}
return res;
}
static const GstQueryType *
gst_rmdemux_src_query_types (GstPad * pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return query_types;
}
static GstStateChangeReturn
gst_rmdemux_change_state (GstElement * element, GstStateChange transition)
{
GstRMDemux *rmdemux = GST_RMDEMUX (element);
GstStateChangeReturn res;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
rmdemux->state = RMDEMUX_STATE_HEADER;
rmdemux->have_pads = FALSE;
rmdemux->segment_start = GST_CLOCK_TIME_NONE;
rmdemux->segment_stop = GST_CLOCK_TIME_NONE;
rmdemux->segment_play = FALSE;
rmdemux->running = FALSE;
rmdemux->cur_timestamp = GST_CLOCK_TIME_NONE;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
res = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_adapter_clear (rmdemux->adapter);
GST_LOCK (rmdemux);
rmdemux->running = FALSE;
GST_UNLOCK (rmdemux);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return res;
}
static GstCaps *
gst_rmdemux_src_getcaps (GstPad * pad)
{
guint n;
GstRMDemux *rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_DEBUG_OBJECT (rmdemux, "getcaps");
for (n = 0; n < rmdemux->n_streams; n++) {
if (rmdemux->streams[n] != NULL && rmdemux->streams[n]->pad == pad) {
return gst_caps_copy (rmdemux->streams[n]->caps);
}
}
/* Base case */
return gst_caps_new_empty ();
}
/* this function is called when the pad is activated and should start
* processing data.
*
* We check if we can do random access to decide if we work push or
* pull based.
*/
static gboolean
gst_rmdemux_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad)) {
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
return gst_pad_activate_push (sinkpad, TRUE);
}
}
/* this function gets called when we activate ourselves in push mode.
* We cannot seek (ourselves) in the stream */
static gboolean
gst_rmdemux_sink_activate_push (GstPad * pad, gboolean active)
{
GstRMDemux *rmdemux;
rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_DEBUG_OBJECT (rmdemux, "activate_push");
rmdemux->seekable = FALSE;
return TRUE;
}
/* this function gets called when we activate ourselves in pull mode.
* We can perform random access to the resource and we start a task
* to start reading */
static gboolean
gst_rmdemux_sink_activate_pull (GstPad * pad, gboolean active)
{
GstRMDemux *rmdemux;
rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_DEBUG_OBJECT (rmdemux, "activate_pull");
if (active) {
rmdemux->seekable = TRUE;
rmdemux->offset = 0;
rmdemux->loop_state = RMDEMUX_LOOP_STATE_HEADER;
rmdemux->data_offset = G_MAXUINT;
return gst_pad_start_task (pad, (GstTaskFunction) gst_rmdemux_loop, pad);
} else {
return gst_pad_stop_task (pad);
}
}
/* random access mode - just pass over to our chain function */
static void
gst_rmdemux_loop (GstPad * pad)
{
GstRMDemux *rmdemux;
GstBuffer *buffer;
GstFlowReturn ret = GST_FLOW_OK;
guint size;
rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_DEBUG_OBJECT (rmdemux, "loop with state=%d and offset=0x%x",
rmdemux->loop_state, rmdemux->offset);
switch (rmdemux->state) {
case RMDEMUX_STATE_HEADER:
size = HEADER_SIZE;
break;
case RMDEMUX_STATE_HEADER_DATA:
size = DATA_SIZE;
break;
case RMDEMUX_STATE_DATA_PACKET:
size = rmdemux->avg_packet_size;
break;
case RMDEMUX_STATE_EOS:
GST_LOG_OBJECT (rmdemux, "At EOS, pausing task");
goto need_pause;
default:
GST_LOG_OBJECT (rmdemux, "Default: requires %d bytes (state is %d)",
(int) rmdemux->size, rmdemux->state);
size = rmdemux->size;
}
ret = gst_pad_pull_range (pad, rmdemux->offset, size, &buffer);
if (ret != GST_FLOW_OK) {
if (rmdemux->offset == rmdemux->index_offset) {
/* The index isn't available so forget about it */
rmdemux->loop_state = RMDEMUX_LOOP_STATE_DATA;
rmdemux->offset = rmdemux->data_offset;
GST_LOCK (rmdemux);
rmdemux->running = TRUE;
rmdemux->seekable = FALSE;
GST_UNLOCK (rmdemux);
return;
} else {
GST_DEBUG_OBJECT (rmdemux,
"Unable to pull %d bytes at offset %p (pull_range returned %d, state is %d)",
(int) size, rmdemux->offset, ret, GST_STATE (rmdemux));
goto need_pause;
}
}
size = GST_BUFFER_SIZE (buffer);
/* Defer to the chain function */
ret = gst_rmdemux_chain (pad, buffer);
if (ret != GST_FLOW_OK) {
GST_DEBUG_OBJECT (rmdemux, "Chain flow failed at %p", rmdemux->offset);
goto need_pause;
}
rmdemux->offset += size;
switch (rmdemux->loop_state) {
case RMDEMUX_LOOP_STATE_HEADER:
if (rmdemux->offset >= rmdemux->data_offset) {
/* It's the end of the header */
rmdemux->loop_state = RMDEMUX_LOOP_STATE_INDEX;
rmdemux->offset = rmdemux->index_offset;
}
break;
case RMDEMUX_LOOP_STATE_INDEX:
if (rmdemux->state == RMDEMUX_STATE_HEADER) {
if (rmdemux->index_offset == 0) {
/* We've read the last index */
rmdemux->loop_state = RMDEMUX_LOOP_STATE_DATA;
rmdemux->offset = rmdemux->data_offset;
GST_LOCK (rmdemux);
rmdemux->running = TRUE;
GST_UNLOCK (rmdemux);
} else {
/* Get the next index */
rmdemux->offset = rmdemux->index_offset;
}
}
break;
case RMDEMUX_LOOP_STATE_DATA:
break;
}
return;
need_pause:
{
GST_LOG_OBJECT (rmdemux, "pausing task");
gst_pad_pause_task (pad);
if (GST_FLOW_IS_FATAL (ret)) {
gst_rmdemux_send_event (rmdemux, gst_event_new_eos ());
/* FIXME: add translations */
GST_ELEMENT_ERROR (rmdemux, STREAM, FAILED,
(("Internal data stream error.")),
("stream stopped, reason %d", ret));
}
return;
}
}
static gboolean
gst_rmdemux_fourcc_isplausible (guint32 fourcc)
{
int i;
for (i = 0; i < 4; i++) {
if (!isprint ((int) ((unsigned char *) (&fourcc))[i])) {
return FALSE;
}
}
return TRUE;
}
static GstFlowReturn
gst_rmdemux_chain (GstPad * pad, GstBuffer * buffer)
{
GstFlowReturn ret = GST_FLOW_OK;
const guint8 *data;
guint16 version;
GstRMDemux *rmdemux = GST_RMDEMUX (GST_PAD_PARENT (pad));
GST_LOG_OBJECT (rmdemux, "Chaining buffer of size %d",
GST_BUFFER_SIZE (buffer));
gst_adapter_push (rmdemux->adapter, buffer);
while (TRUE) {
GST_LOG_OBJECT (rmdemux, "looping in chain");
switch (rmdemux->state) {
case RMDEMUX_STATE_HEADER:
{
if (gst_adapter_available (rmdemux->adapter) < HEADER_SIZE)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, HEADER_SIZE);
rmdemux->object_id = RMDEMUX_FOURCC_GET (data + 0);
rmdemux->size = RMDEMUX_GUINT32_GET (data + 4) - HEADER_SIZE;
rmdemux->object_version = RMDEMUX_GUINT16_GET (data + 8);
/* Sanity-check. We assume that the FOURCC is printable ASCII */
if (!gst_rmdemux_fourcc_isplausible (rmdemux->object_id)) {
/* Failed. Remain in HEADER state, try again... We flush only
* the actual FOURCC, not the entire header, because we could
* need to resync anywhere at all... really, this should never
* happen. */
GST_WARNING_OBJECT (rmdemux, "Bogus looking header, unprintable "
"FOURCC");
gst_adapter_flush (rmdemux->adapter, 4);
break;
}
GST_LOG_OBJECT (rmdemux, "header found with object_id="
GST_FOURCC_FORMAT
" size=%08x object_version=%d",
GST_FOURCC_ARGS (rmdemux->object_id), rmdemux->size,
rmdemux->object_version);
gst_adapter_flush (rmdemux->adapter, HEADER_SIZE);
switch (rmdemux->object_id) {
case GST_MAKE_FOURCC ('.', 'R', 'M', 'F'):
rmdemux->state = RMDEMUX_STATE_HEADER_RMF;
break;
case GST_MAKE_FOURCC ('P', 'R', 'O', 'P'):
rmdemux->state = RMDEMUX_STATE_HEADER_PROP;
break;
case GST_MAKE_FOURCC ('M', 'D', 'P', 'R'):
rmdemux->state = RMDEMUX_STATE_HEADER_MDPR;
break;
case GST_MAKE_FOURCC ('I', 'N', 'D', 'X'):
rmdemux->state = RMDEMUX_STATE_HEADER_INDX;
break;
case GST_MAKE_FOURCC ('D', 'A', 'T', 'A'):
rmdemux->state = RMDEMUX_STATE_HEADER_DATA;
break;
case GST_MAKE_FOURCC ('C', 'O', 'N', 'T'):
rmdemux->state = RMDEMUX_STATE_HEADER_CONT;
break;
default:
rmdemux->state = RMDEMUX_STATE_HEADER_UNKNOWN;
break;
}
break;
}
case RMDEMUX_STATE_HEADER_UNKNOWN:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
GST_WARNING_OBJECT (rmdemux, "Unknown object_id " GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (rmdemux->object_id));
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_RMF:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
if ((rmdemux->object_version == 0) || (rmdemux->object_version == 1)) {
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse__rmf (rmdemux, data, rmdemux->size);
}
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_PROP:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_prop (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_MDPR:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_mdpr (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_CONT:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_cont (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_HEADER_DATA:
{
/* If we haven't already done so then signal there are no more pads */
if (!rmdemux->have_pads) {
gst_element_no_more_pads (GST_ELEMENT (rmdemux));
rmdemux->have_pads = TRUE;
GST_LOG_OBJECT (rmdemux, "no more pads.");
gst_rmdemux_send_event (rmdemux,
gst_event_new_newsegment (FALSE, 1.0, GST_FORMAT_TIME, (gint64) 0,
(gint64) - 1, 0));
}
/* The actual header is only 8 bytes */
rmdemux->size = DATA_SIZE;
GST_DEBUG_OBJECT (rmdemux, "data available %d",
gst_adapter_available (rmdemux->adapter));
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_data (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
rmdemux->state = RMDEMUX_STATE_DATA_PACKET;
break;
}
case RMDEMUX_STATE_HEADER_INDX:
{
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
rmdemux->size = gst_rmdemux_parse_indx (rmdemux, data, rmdemux->size);
/* Only flush the header */
gst_adapter_flush (rmdemux->adapter, HEADER_SIZE);
rmdemux->state = RMDEMUX_STATE_INDX_DATA;
break;
}
case RMDEMUX_STATE_INDX_DATA:
{
/* There's not always an data to get... */
if (rmdemux->size > 0) {
if (gst_adapter_available (rmdemux->adapter) < rmdemux->size)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, rmdemux->size);
gst_rmdemux_parse_indx_data (rmdemux, data, rmdemux->size);
gst_adapter_flush (rmdemux->adapter, rmdemux->size);
}
rmdemux->state = RMDEMUX_STATE_HEADER;
break;
}
case RMDEMUX_STATE_DATA_PACKET:
{
if (gst_adapter_available (rmdemux->adapter) < 2)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, 2);
version = RMDEMUX_GUINT16_GET (data);
GST_DEBUG_OBJECT (rmdemux, "Data packet with version=%d", version);
if (version == 0 || version == 1) {
guint16 length;
if (gst_adapter_available (rmdemux->adapter) < 4)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, 4);
length = RMDEMUX_GUINT16_GET (data + 2);
if (length < 4) {
/* Invalid, just drop it */
gst_adapter_flush (rmdemux->adapter, 4);
} else {
if (gst_adapter_available (rmdemux->adapter) < length)
goto unlock;
data = gst_adapter_peek (rmdemux->adapter, length);
gst_rmdemux_parse_packet (rmdemux, data + 4, version, length - 4);
rmdemux->chunk_index++;
gst_adapter_flush (rmdemux->adapter, length);
}
if (rmdemux->chunk_index == rmdemux->n_chunks || length == 0)
rmdemux->state = RMDEMUX_STATE_HEADER;
} else {
/* Stream done */
gst_adapter_flush (rmdemux->adapter, 2);
if (rmdemux->data_offset == 0) {
GST_LOG_OBJECT (rmdemux,
"No further data, internal demux state EOS");
rmdemux->state = RMDEMUX_STATE_EOS;
} else
rmdemux->state = RMDEMUX_STATE_HEADER;
}
break;
}
case RMDEMUX_STATE_EOS:
gst_rmdemux_send_event (rmdemux, gst_event_new_eos ());
goto unlock;
default:
GST_WARNING_OBJECT (rmdemux, "Unhandled state %d", rmdemux->state);
goto unlock;
}
}
unlock:
return ret;
}
static GstRMDemuxStream *
gst_rmdemux_get_stream_by_id (GstRMDemux * rmdemux, int id)
{
int i;
for (i = 0; i < rmdemux->n_streams; i++) {
GstRMDemuxStream *stream;
stream = rmdemux->streams[i];
if (stream->id == id) {
return stream;
}
}
return NULL;
}
static gboolean
gst_rmdemux_send_event (GstRMDemux * rmdemux, GstEvent * event)
{
int i;
gboolean ret = TRUE;
for (i = 0; i < rmdemux->n_streams; i++) {
GstRMDemuxStream *stream;
stream = rmdemux->streams[i];
GST_DEBUG_OBJECT (rmdemux, "Pushing event to stream %d", i);
gst_event_ref (event);
ret = gst_pad_push_event (stream->pad, event);
if (!ret)
break;
}
gst_event_unref (event);
return ret;
}
void
gst_rmdemux_add_stream (GstRMDemux * rmdemux, GstRMDemuxStream * stream)
{
int version = 0;
if (stream->subtype == GST_RMDEMUX_STREAM_VIDEO) {
char *name = g_strdup_printf ("video_%02d", rmdemux->n_video_streams);
stream->pad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_rmdemux_videosrc_template), name);
g_free (name);
switch (stream->fourcc) {
case GST_RM_VDO_RV10:
version = 1;
break;
case GST_RM_VDO_RV20:
version = 2;
break;
case GST_RM_VDO_RV30:
version = 3;
break;
case GST_RM_VDO_RV40:
version = 4;
break;
default:
GST_WARNING_OBJECT (rmdemux, "Unknown video FOURCC code");
}
if (version) {
stream->caps =
gst_caps_new_simple ("video/x-pn-realvideo", "rmversion", G_TYPE_INT,
(int) version,
"format", G_TYPE_INT,
(int) stream->format,
"subformat", G_TYPE_INT, (int) stream->subformat, NULL);
}
if (stream->caps) {
gst_caps_set_simple (stream->caps,
"width", G_TYPE_INT, stream->width,
"height", G_TYPE_INT, stream->height,
"framerate", G_TYPE_DOUBLE, stream->frame_rate, NULL);
}
rmdemux->n_video_streams++;
} else if (stream->subtype == GST_RMDEMUX_STREAM_AUDIO) {
char *name = g_strdup_printf ("audio_%02d", rmdemux->n_audio_streams);
stream->pad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_rmdemux_audiosrc_template), name);
GST_LOG_OBJECT (rmdemux, "Created audio pad \"%s\"", name);
g_free (name);
switch (stream->fourcc) {
/* Older RealAudio Codecs */
case GST_RM_AUD_14_4:
version = 1;
break;
case GST_RM_AUD_28_8:
version = 2;
break;
/* DolbyNet (Dolby AC3, low bitrate) */
case GST_RM_AUD_DNET:
stream->caps =
gst_caps_new_simple ("audio/x-ac3", "rate", G_TYPE_INT,
(int) stream->rate, NULL);
break;
/* RealAudio 10 (AAC) */
case GST_RM_AUD_RAAC:
version = 10;
break;
/* MPEG-4 based */
case GST_RM_AUD_RACP:
stream->caps =
gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT,
(int) 4, NULL);
break;
/* Sony ATRAC3 */
case GST_RM_AUD_ATRC:
stream->caps = gst_caps_new_simple ("audio/x-vnd.sony.atrac3", NULL);
break;
/* RealAudio G2 audio */
case GST_RM_AUD_COOK:
version = 8;
break;
/* RALF is lossless */
case GST_RM_AUD_RALF:
GST_DEBUG_OBJECT (rmdemux, "RALF");
stream->caps = gst_caps_new_simple ("audio/x-ralf-mpeg4-generic", NULL);
break;
/* Sipro/ACELP.NET Voice Codec (MIME unknown) */
case GST_RM_AUD_SIPR:
stream->caps = gst_caps_new_simple ("audio/x-sipro", NULL);
break;
default:
GST_WARNING_OBJECT (rmdemux,
"Unknown audio FOURCC code \"" GST_FOURCC_FORMAT "\"",
stream->fourcc);
break;
}
if (version) {
stream->caps =
gst_caps_new_simple ("audio/x-pn-realaudio", "raversion", G_TYPE_INT,
(int) version, NULL);
}
if (stream->caps) {
gst_caps_set_simple (stream->caps,
"flavor", G_TYPE_INT, (int) stream->flavor,
"rate", G_TYPE_INT, (int) stream->rate,
"channels", G_TYPE_INT, (int) stream->n_channels,
"width", G_TYPE_INT, (int) stream->sample_width,
"leaf_size", G_TYPE_INT, (int) stream->leaf_size,
"packet_size", G_TYPE_INT, (int) stream->packet_size,
"height", G_TYPE_INT, (int) stream->height, NULL);
}
rmdemux->n_audio_streams++;
} else {
GST_WARNING_OBJECT (rmdemux, "not adding stream of type %d",
stream->subtype);
return;
}
GST_PAD_ELEMENT_PRIVATE (stream->pad) = stream;
rmdemux->streams[rmdemux->n_streams] = stream;
rmdemux->n_streams++;
GST_LOG_OBJECT (rmdemux, "n_streams is now %d", rmdemux->n_streams);
if (stream->pad && stream->caps) {
GST_DEBUG_OBJECT (rmdemux, "setting caps: %p", stream->caps);
gst_pad_set_caps (stream->pad, stream->caps);
gst_caps_unref (stream->caps);
gst_pad_set_getcaps_function (stream->pad,
GST_DEBUG_FUNCPTR (gst_rmdemux_src_getcaps));
gst_pad_set_event_function (stream->pad,
GST_DEBUG_FUNCPTR (gst_rmdemux_src_event));
gst_pad_set_query_type_function (stream->pad,
GST_DEBUG_FUNCPTR (gst_rmdemux_src_query_types));
gst_pad_set_query_function (stream->pad,
GST_DEBUG_FUNCPTR (gst_rmdemux_src_query));
GST_DEBUG_OBJECT (rmdemux, "adding pad %p to rmdemux %p", stream->pad,
rmdemux);
gst_element_add_pad (GST_ELEMENT (rmdemux), stream->pad);
gst_pad_push_event (stream->pad,
gst_event_new_newsegment (FALSE, 1.0, GST_FORMAT_TIME, (gint64) 0,
(gint64) - 1, 0));
/* If there's some extra data then send it as the first packet */
if (stream->extra_data_size > 0) {
GstBuffer *buffer;
if (gst_pad_alloc_buffer (stream->pad, GST_BUFFER_OFFSET_NONE,
stream->extra_data_size, stream->caps, &buffer) != GST_FLOW_OK) {
GST_WARNING_OBJECT (rmdemux, "failed to alloc extra_data src "
"buffer for stream %d", stream->id);
return;
}
memcpy (GST_BUFFER_DATA (buffer), stream->extra_data,
stream->extra_data_size);
if (GST_PAD_IS_USABLE (stream->pad)) {
GST_DEBUG_OBJECT (rmdemux, "Pushing extra_data of size %d to pad",
stream->extra_data_size);
gst_pad_push (stream->pad, buffer);
}
}
}
}
G_GNUC_UNUSED static void
re_hexdump_bytes (guint8 * ptr, int len, int offset)
{
guint8 *end = ptr + len;
int i;
while (1) {
if (ptr >= end)
return;
g_print ("%08x: ", offset);
for (i = 0; i < 16; i++) {
if (ptr + i >= end) {
g_print (" ");
} else {
g_print ("%02x ", ptr[i]);
}
}
for (i = 0; i < 16; i++) {
if (ptr + i >= end) {
g_print (" ");
} else {
g_print ("%c", g_ascii_isprint (ptr[i]) ? ptr[i] : '.');
}
}
g_print ("\n");
ptr += 16;
offset += 16;
}
}
static char *
re_get_pascal_string (const guint8 * ptr)
{
int length;
length = ptr[0];
return g_strndup ((char *) ptr + 1, length);
}
static int
re_skip_pascal_string (const guint8 * ptr)
{
int length;
length = ptr[0];
return length + 1;
}
static void
gst_rmdemux_parse__rmf (GstRMDemux * rmdemux, const void *data, int length)
{
GST_LOG_OBJECT (rmdemux, "file_version: %d", RMDEMUX_GUINT32_GET (data));
GST_LOG_OBJECT (rmdemux, "num_headers: %d", RMDEMUX_GUINT32_GET (data + 4));
}
static void
gst_rmdemux_parse_prop (GstRMDemux * rmdemux, const void *data, int length)
{
GST_LOG_OBJECT (rmdemux, "max bitrate: %d", RMDEMUX_GUINT32_GET (data));
GST_LOG_OBJECT (rmdemux, "avg bitrate: %d", RMDEMUX_GUINT32_GET (data + 4));
GST_LOG_OBJECT (rmdemux, "max packet size: %d",
RMDEMUX_GUINT32_GET (data + 8));
rmdemux->avg_packet_size = RMDEMUX_GUINT32_GET (data + 12);
GST_LOG_OBJECT (rmdemux, "avg packet size: %d", rmdemux->avg_packet_size);
rmdemux->num_packets = RMDEMUX_GUINT32_GET (data + 16);
GST_LOG_OBJECT (rmdemux, "number of packets: %d", rmdemux->num_packets);
GST_LOG_OBJECT (rmdemux, "duration: %d", RMDEMUX_GUINT32_GET (data + 20));
rmdemux->duration = RMDEMUX_GUINT32_GET (data + 20) * GST_MSECOND;
GST_LOG_OBJECT (rmdemux, "preroll: %d", RMDEMUX_GUINT32_GET (data + 24));
rmdemux->index_offset = RMDEMUX_GUINT32_GET (data + 28);
GST_LOG_OBJECT (rmdemux, "offset of INDX section: 0x%08x",
rmdemux->index_offset);
rmdemux->data_offset = RMDEMUX_GUINT32_GET (data + 32);
GST_LOG_OBJECT (rmdemux, "offset of DATA section: 0x%08x",
rmdemux->data_offset);
GST_LOG_OBJECT (rmdemux, "n streams: %d", RMDEMUX_GUINT16_GET (data + 36));
GST_LOG_OBJECT (rmdemux, "flags: 0x%04x", RMDEMUX_GUINT16_GET (data + 38));
}
static void
gst_rmdemux_parse_mdpr (GstRMDemux * rmdemux, const void *data, int length)
{
GstRMDemuxStream *stream;
char *stream1_type_string;
char *stream2_type_string;
int stream_type;
int offset;
//re_hexdump_bytes ((guint8 *) data, length, 0);
stream = g_new0 (GstRMDemuxStream, 1);
stream->id = RMDEMUX_GUINT16_GET (data);
stream->index = NULL;
stream->seek_offset = 0;
GST_LOG_OBJECT (rmdemux, "stream_number=%d", stream->id);
offset = 30;
stream_type = GST_RMDEMUX_STREAM_UNKNOWN;
stream1_type_string = re_get_pascal_string (data + offset);
offset += re_skip_pascal_string (data + offset);
stream2_type_string = re_get_pascal_string (data + offset);
offset += re_skip_pascal_string (data + offset);
/* stream1_type_string for audio and video stream is a "put_whatever_you_want" field :
observed values :
- "[The ]Video/Audio Stream" (File produced by an official Real encoder)
- "RealVideoPremierePlugIn-VIDEO/AUDIO" (File produced by Abobe Premiere)
so, we should not rely on it to know which stream type it is
*/
GST_LOG_OBJECT (rmdemux, "stream type: %s", stream1_type_string);
GST_LOG_OBJECT (rmdemux, "MIME type=%s", stream2_type_string);
if (strcmp (stream2_type_string, "video/x-pn-realvideo") == 0) {
stream_type = GST_RMDEMUX_STREAM_VIDEO;
} else if (strcmp (stream2_type_string, "audio/x-pn-realaudio") == 0) {
stream_type = GST_RMDEMUX_STREAM_AUDIO;
} else if (strcmp (stream2_type_string, "audio/x-ralf-mpeg4-generic") == 0) {
/* Another audio type found in the real testsuite */
stream_type = GST_RMDEMUX_STREAM_AUDIO;
} else if (strcmp (stream1_type_string, "") == 0 &&
strcmp (stream2_type_string, "logical-fileinfo") == 0) {
stream_type = GST_RMDEMUX_STREAM_FILEINFO;
} else {
stream_type = GST_RMDEMUX_STREAM_UNKNOWN;
GST_WARNING_OBJECT (rmdemux, "unknown stream type \"%s\",\"%s\"",
stream1_type_string, stream2_type_string);
}
g_free (stream1_type_string);
g_free (stream2_type_string);
offset += 4;
stream->subtype = stream_type;
switch (stream_type) {
case GST_RMDEMUX_STREAM_VIDEO:
/* RV10/RV20/RV30/RV40 => video/x-pn-realvideo, version=1,2,3,4 */
stream->fourcc = RMDEMUX_FOURCC_GET (data + offset + 8);
stream->width = RMDEMUX_GUINT16_GET (data + offset + 12);
stream->height = RMDEMUX_GUINT16_GET (data + offset + 14);
stream->rate = RMDEMUX_GUINT16_GET (data + offset + 16);
stream->subformat = RMDEMUX_GUINT32_GET (data + offset + 26);
stream->format = RMDEMUX_GUINT32_GET (data + offset + 30);
stream->extra_data_size = length - (offset + 34);
stream->extra_data = (guint8 *) data + offset + 34;
stream->frame_rate = (double) RMDEMUX_GUINT16_GET (data + offset + 22) +
((double) RMDEMUX_GUINT16_GET (data + offset + 24) / 65536.0);
GST_DEBUG_OBJECT (rmdemux,
"Video stream with fourcc=" GST_FOURCC_FORMAT
" width=%d height=%d rate=%d frame_rate=%f subformat=%x format=%x extra_data_size=%d",
GST_FOURCC_ARGS (stream->fourcc), stream->width, stream->height,
stream->rate, stream->frame_rate, stream->subformat, stream->format,
stream->extra_data_size);
break;
case GST_RMDEMUX_STREAM_AUDIO:{
stream->version = RMDEMUX_GUINT16_GET (data + offset + 4);
stream->flavor = RMDEMUX_GUINT16_GET (data + offset + 22);
stream->packet_size = RMDEMUX_GUINT32_GET (data + offset + 24);
stream->leaf_size = RMDEMUX_GUINT16_GET (data + offset + 44);
stream->height = RMDEMUX_GUINT16_GET (data + offset + 40);
switch (stream->version) {
case 4:
stream->rate = RMDEMUX_GUINT16_GET (data + offset + 48);
stream->sample_width = RMDEMUX_GUINT16_GET (data + offset + 52);
stream->n_channels = RMDEMUX_GUINT16_GET (data + offset + 54);
stream->fourcc = RMDEMUX_FOURCC_GET (data + offset + 62);
stream->extra_data_size = 16;
stream->extra_data = (guint8 *) data + offset + 71;
break;
case 5:
stream->rate = RMDEMUX_GUINT16_GET (data + offset + 54);
stream->sample_width = RMDEMUX_GUINT16_GET (data + offset + 58);
stream->n_channels = RMDEMUX_GUINT16_GET (data + offset + 60);
stream->fourcc = RMDEMUX_FOURCC_GET (data + offset + 66);
stream->extra_data_size = RMDEMUX_GUINT32_GET (data + offset + 74);
stream->extra_data = (guint8 *) data + offset + 78;
break;
}
/* 14_4, 28_8, cook, dnet, sipr, raac, racp, ralf, atrc */
GST_DEBUG_OBJECT (rmdemux,
"Audio stream with rate=%d sample_width=%d n_channels=%d",
stream->rate, stream->sample_width, stream->n_channels);
break;
}
case GST_RMDEMUX_STREAM_FILEINFO:
{
int element_nb;
/* Length of this section */
GST_DEBUG_OBJECT (rmdemux, "length2: 0x%08x",
RMDEMUX_GUINT32_GET (data + offset));
offset += 4;
/* Unknown : 00 00 00 00 */
offset += 4;
/* Number of variables that would follow (loop iterations) */
element_nb = RMDEMUX_GUINT32_GET (data + offset);
offset += 4;
while (element_nb) {
/* Category Id : 00 00 00 XX 00 00 */
offset += 6;
/* Variable Name */
offset += re_skip_pascal_string (data + offset);
/* Variable Value Type */
/* 00 00 00 00 00 => integer/boolean, preceded by length */
/* 00 00 00 02 00 => pascal string, preceded by length, no trailing \0 */
offset += 5;
/* Variable Value */
offset += re_skip_pascal_string (data + offset);
element_nb--;
}
}
break;
case GST_RMDEMUX_STREAM_UNKNOWN:
default:
break;
}
gst_rmdemux_add_stream (rmdemux, stream);
}
static guint
gst_rmdemux_parse_indx (GstRMDemux * rmdemux, const void *data, int length)
{
int n;
int id;
n = RMDEMUX_GUINT32_GET (data);
id = RMDEMUX_GUINT16_GET (data + 4);
rmdemux->index_offset = RMDEMUX_GUINT32_GET (data + 6);
GST_DEBUG_OBJECT (rmdemux, "Number of indices=%d Stream ID=%d length=%d", n,
id, length);
/* Point to the next index_stream */
rmdemux->index_stream = gst_rmdemux_get_stream_by_id (rmdemux, id);
/* Return the length of the index */
return 14 * n;
}
static void
gst_rmdemux_parse_indx_data (GstRMDemux * rmdemux, const void *data, int length)
{
int i;
int n;
GstRMDemuxIndex *index;
/* The number of index records */
n = length / 14;
if (rmdemux->index_stream == NULL)
return;
index = g_malloc (sizeof (GstRMDemuxIndex) * n);
rmdemux->index_stream->index = index;
rmdemux->index_stream->index_length = n;
for (i = 0; i < n; i++) {
index[i].timestamp = RMDEMUX_GUINT32_GET (data + 2) * GST_MSECOND;
index[i].offset = RMDEMUX_GUINT32_GET (data + 6);
GST_DEBUG_OBJECT (rmdemux, "Index found for timestamp=%f (at offset=%x)",
(float) index[i].timestamp / GST_SECOND, index[i].offset);
data += 14;
}
}
static void
gst_rmdemux_parse_data (GstRMDemux * rmdemux, const void *data, int length)
{
rmdemux->n_chunks = RMDEMUX_GUINT32_GET (data);
rmdemux->data_offset = RMDEMUX_GUINT32_GET (data + 4);
rmdemux->chunk_index = 0;
GST_DEBUG_OBJECT (rmdemux,
"Data chunk found with %d packets (next data at %p)", rmdemux->n_chunks,
rmdemux->data_offset);
}
static void
gst_rmdemux_parse_cont (GstRMDemux * rmdemux, const void *data, int length)
{
gchar *title = (gchar *) re_get_pascal_string (data);
GST_DEBUG_OBJECT (rmdemux, "File Content : (CONT) %s", title);
g_free (title);
}
static GstFlowReturn
gst_rmdemux_parse_packet (GstRMDemux * rmdemux, const void *data,
guint16 version, guint16 length)
{
guint16 id;
GstRMDemuxStream *stream;
GstBuffer *buffer;
guint16 packet_size;
id = RMDEMUX_GUINT16_GET (data);
rmdemux->cur_timestamp = RMDEMUX_GUINT32_GET (data + 2) * GST_MSECOND;
GST_DEBUG_OBJECT (rmdemux,
"Parsing a packet for stream=%d, timestamp=" GST_TIME_FORMAT
", version=%d", id, GST_TIME_ARGS (rmdemux->cur_timestamp), version);
// TODO: This is skipping over either 2 or 3 bytes (version dependent)
// without even reading it. What are these for?
if (version == 0) {
data += 8;
packet_size = length - 8;
} else {
data += 9;
packet_size = length - 9;
}
stream = gst_rmdemux_get_stream_by_id (rmdemux, id);
if (!stream) {
GST_WARNING_OBJECT (rmdemux, "No stream for stream id %d in parsing "
"data packet", id);
return GST_FLOW_OK;
}
if ((rmdemux->offset + packet_size) > stream->seek_offset &&
stream && stream->pad && GST_PAD_IS_USABLE (stream->pad)) {
if (gst_pad_alloc_buffer (stream->pad, GST_BUFFER_OFFSET_NONE,
packet_size, stream->caps, &buffer) != GST_FLOW_OK) {
GST_WARNING_OBJECT (rmdemux, "failed to alloc src buffer for stream %d",
id);
return GST_FLOW_ERROR;
}
memcpy (GST_BUFFER_DATA (buffer), (guint8 *) data, packet_size);
GST_BUFFER_TIMESTAMP (buffer) = rmdemux->cur_timestamp;
GST_DEBUG_OBJECT (rmdemux, "Pushing buffer of size %d to pad", packet_size);
return gst_pad_push (stream->pad, buffer);
} else {
GST_DEBUG_OBJECT (rmdemux,
"Stream %d is skipping: seek_offset=%d, offset=%d, packet_size",
stream->id, stream->seek_offset, rmdemux->offset, packet_size);
return GST_FLOW_OK;
}
}
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